(Summary description)When the battery is in use, if there is a short circuit or overcharge, a large amount of heat will accumulate inside the battery, which will cause the internal pressure of the battery to rise and explode. Therefore, the battery needs to install a PUW pressure relief valve to discharge the excessive internal pressure during the manufacturing process. . PUW battery pressure relief valve is a safety relief valve that is waterproof, breathable, and explosion-proof. It is more reliable and more powerful than traditional safety relief valves. The PUW battery pressure relief valve allows the excessive pressure inside the battery to be discharged, and the pressure inside and outside the battery is balanced. In this process, water cannot get in. And when the battery is short-circuited, overcharged, thermally out of control, etc., the PUW battery pressure relief valve can quickly release the pressure and exhaust, avoiding the explosion of the battery pack. Air permeability before blasting: ≥600ml/min@1.5Kpa (air permeability under normal conditions) Ventilation rate after blasting: ≥1000L/min@10Kpa (ventilation rate after reaching explosion-proof pressure) Explosion-proof pressure (customizable): 3±1Kpa Can be divided into low pressure blasting (3~5Kpa), medium pressure blasting (10~20Kpa), high pressure blasting (above 30Kpa) Temperature resistance range: -40～150℃ Product specifications: PBA4K-50 Flame retardant rating: UL 94-V0 Protection level: IP68 (1 meter water depth for 48 hours), IP6K9K Basic functions: pressure balance, waterproof, breathable and explosion-proof, pressure relief and exhaust (air pressure balance inside and outside the battery pack) Pressure relief balance valve After PUW entered the automotive field in 2013, it has been committed to the research and development, production and sales of protective products in the field of auto parts. PUW entered the field of automotive 3-electric protection (battery, electric drive, electronic control), and formally developed it in 2014 The battery explosion-proof valve has quickly become a leader in automobile battery protection, and has successively provided services for SAIC, Geely, BYD, Dongfeng Electric, Wanxiang, BAK, CATL, BAIC, etc.